252691820 has 12 divisors (see below), whose sum is σ = 530652864. Its totient is φ = 101076720.

The previous prime is 252691801. The next prime is 252691847. The reversal of 252691820 is 28196252.

It is a happy number.

252691820 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6317276 + ... + 6317315.

It is an arithmetic number, because the mean of its divisors is an integer number (44221072).

Almost surely, 2^252691820 is an apocalyptic number.

252691820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

252691820 is an abundant number, since it is smaller than the sum of its proper divisors (277961044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

252691820 is a wasteful number, since it uses less digits than its factorization.

252691820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12634600 (or 12634598 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 252691820 is about 15896.2832133804. The cubic root of 252691820 is about 632.2134453701.

The spelling of 252691820 in words is "two hundred fifty-two million, six hundred ninety-one thousand, eight hundred twenty".